Cleanup dangling PVCs which were created by tidb-operator

cleanup-pvc.sh

#!/bin/bash
set -xuo pipefail

IFS='
'
pvc2tcs=( $(kubectl get pvc -l app.kubernetes.io/managed-by=tidb-operator,app.kubernetes.io/name=tidb-cluster -o jsonpath="{range .items[*]}{.metadata.name}{' '}{.metadata.labels.app\.kubernetes\.io/instance}{'\n'}{end}") )
echo "Cleanup all dangling PVCs created by tidb-operator."
for pvc2tc in "${pvc2tcs[@]}"; do
    pvc=$(echo "${pvc2tc}" | awk -F ' ' '{print $1}')
    tc=$(echo "${pvc2tc}" | awk -F ' ' '{print $2}')
    kubectl get tc "${tc}" >/dev/null || kubectl delete pvc "${pvc}"
done